Malicious PDF — malware analysis report

Static analysis result for SHA-256 addfe62d40dabe80…

MALICIOUS

PDF

43.6 KB Created: 2020-08-04 12:25:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96e478988d45f69a689a07a9c6b13814 SHA-1: 4d98c09bd6221e7cb9f1e9215f9e02827d12eefe SHA-256: addfe62d40dabe8083e75b8fadce95370bc4f784940a11488845a5e9536182c3
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious URL is used to redirect users, likely to a phishing or malware distribution site. The document body, though partially corrupted, contains the title 'Angulos en la circunferencia pdf' and mentions 'wkhtmltopdf', suggesting it's a lure document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=angulos+en+la+circunferencia+pdf
    • http://files.klv53.com/uploads/1/3/1/6/131607062/4783390.pdf
    • http://files.lorettacrogersnovels.com/uploads/1/3/1/1/131163833/sarijezerevabe_riwujege_nupetis.pdf
    • http://files.lovolutionofkindness.com/uploads/1/3/0/8/130815437/vuzelifizod.pdf
    • http://files.nwdoulaconference.com/uploads/1/3/1/8/131856122/a316e759d443b4.pdf
    • http://files.willowbendsoapshop.com/uploads/1/3/0/8/130874067/dopiladamenewasutera.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/zamufok.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52325197595.pdf
    • https://cdn.shopify.com/s/files/1/0437/6854/5441/files/94806619391.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/wediwefu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/vepajulax.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/penovemi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/94877776486.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2367/files/difference_between_receptive_and_expressive_language.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/47059163779.pdf
    • https://cdn.shopify.com/s/files/1/0432/9698/1147/files/tonarazeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/9954569983.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006497.bin
e9877c0f7ff748a6f3c234965e9e32cfef729061036bcec206113c31c190e2d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6497 5312 bytes
font_01_sfnt_off000076bd.bin
33bd9efc01517173a653daa0fa36a75b9eddb8b825d75adfee88cb02fdbd2468		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76BD 13540 bytes

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